﻿254 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 102 



the prominent ridges of the adult. Caudal rami a little shorter than 

 the abdomen, terminal setae shorter than in Stage a. 



All appendages considerably larger and more chitinized than in 

 Stage a. Outer piece of maxilla 1 a more slender spine than in 

 adult ; claws of second maxilla longer, but of same general shape as in 

 Stage a. Rod between legs 1 and 2 well developed. All legs with 

 rami completely segmented; leg 4, however, not large, and its spines 

 weak and flattened. 



This chalimus is almost as long as Bere's specimen from the Gulf of 

 Mexico which, however, is as completely developed as the adult. 



Hosts and dhtribution. — Mania sp., Atlantic Ocean, near the Azores 

 (van Beneden) ; Manta hirostrh (Walbaum), Pacific Ocean, near the 

 Galapagos Islands (C. B. Wilson) ; "probably" Mohula hypostoma 

 (Bancroft), Gulf of Mexico, in Lemon Bay, Fla. (Bere). 



Reinarhs. — The identification of these Pacific and Gulf of Mexico 

 specimens with the female of the type species from the Atlantic 

 would seem from a comparison with van Beneden's original descrip- 

 tion and illustrations to be correct. His drawing of the female shows 

 the same general shape of the various parts of the body, and the dorsal 

 design on the genital segment is closely similar, the midinvagination 

 of the posterior margin being characteristic of the species. His illus- 

 tration differs in that the anterior lobe of this design is considerably 

 narrower and the sides longer. In his figure, also, the posterior inside 

 margins of the genital segment are more rounded with the corners 

 less produced, and the abdomen is unsegmented and longer in pro- 

 portion to the genital segment. 



The only illustrations van Beneden gave of the appendages are 

 some very incomplete figures of those of the cephalic area. These, 

 however, show two important characteristics of the species : The ex- 

 tension of the outer portion of the first maxilla into a slender spine, 

 and the triangular shape of the posterior ventral accessory processes. 

 As these are distinctive features of the Pacific and Gulf of Mexico 

 specimens it seems reasonable to assume that they are identical with 

 those of van Beneden. 



The form described by van Beneden as the male of Pupulina flores 

 has been stated by C. B. Wilson (1935a, 1935b) to be an immature 

 female of ParaleMon elongatus C. B. Wilson. 



PUPULINA MINOR, new species 

 Plate 13 

 Pupxilina flores, in part, Beee, 1936, p. 590, the "smaller" specimens. 



Spechmens examined. — Two females, one ovigerous ; two males ; col- 

 lected by G. E. MacGinitie, from the giant ray Mohula lucasana Beebe 



